1. Departamento de Producción Animal y Pasturas; Facultad de Agronomía; Universidad de la República; Montevideo Uruguay
2. Departamento Genética y Mejoramiento Animal; Facultad de Veterinaria; Universidad de la República; Montevideo Uruguay
3. Department of Animal Sciences; University of Florida; Gainesville Florida
4. University of Florida Genetics Institute; University of Florida; Gainesville Florida
5. Department of Molecular Biology and Genetics; Aarhus University; Tjele Denmark
6. Department of Animal Science/Epidemiology & Biostatistic; Michigan State University; East Lansing Michigan